I suspect the woman far left is Abigail Coan.The two middle women may be her sisters Emma & OrindaThe girl far right may be Abigail's surviving daughter Annie O.or the daughter Emma G. who died at 15 when Annie was 12. Annie was 3 years younger than Emma, so I doubt she'd be left out of the picture

Annie Oliver & the woman who was pictured with Frank above.Same steamer- Betty Alden. Perhaps Elsie took these pictures.There is a picture of Elsie at Plymouth Rock I'll dig up to estimate her age.